|  | 6.3 | Standard ACLs
| 6.3.1 | What are standard ACLs
You use standard ACLs when you want to block all traffic from a network, allow all traffic from a specific network, or deny protocol suites. Standard ACLs check the source address of packets that could be routed. The result permits or denies output for an entire protocol suite, based on the network, subnet, and host addresses. For example, packets coming in E0 are checked for source address and protocol. If they are permitted, the packets are output through S0, which is grouped to the ACL. If they are not permitted, they are dropped.